2100885496705 has 4 divisors (see below), whose sum is σ = 2521062596052. Its totient is φ = 1680708397360.

The previous prime is 2100885496673. The next prime is 2100885496727. The reversal of 2100885496705 is 5076945880012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1597597409521 + 503288087184 = 1263961^2 + 709428^2 .

It is not a de Polignac number, because 2100885496705 - 2⁵ = 2100885496673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210088549666 + ... + 210088549675.

It is an arithmetic number, because the mean of its divisors is an integer number (630265649013).

Almost surely, 2^{2100885496705} is an apocalyptic number.

It is an amenable number.

2100885496705 is a deficient number, since it is larger than the sum of its proper divisors (420177099347).

2100885496705 is an equidigital number, since it uses as much as digits as its factorization.

2100885496705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420177099346.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 2100885496705 in words is "two trillion, one hundred billion, eight hundred eighty-five million, four hundred ninety-six thousand, seven hundred five".